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Viscosity Indices Calculated from Basic Kinematic Values 6.00 To 10.00 Centistokes At 210 degrees F. Compiled by Standard Oil Development Co., Standard Inspection Laboratory, Circular No. 30.53, March 1, 1939. This copy is the 1951 reprint. Please consult scans for the first page of introduction. Unpaginated, but about 200 pages of tables. Measures 7.5 x 4.5 inches. Plastic comb-back binding with card covers. This booklet is the 1951 reprint of the first issue of 1939. Though it has the number 2 at foot of front cover, it is complete in itself for the kinematic values stated in the title. Former owner's name at top right of front cover and first page, and a dot of soiling below that; else clean and unmarked.